Solution: A plane flies from base camp to Lake A 280 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B which is 190 km at 30.0° west of north from Lake A. Graphically

Problem

A plane flies from base camp to Lake A 280 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B which is 190 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp.